DALLAS -- Quarterback Johnny Manziel accounted for 418 total yards and six touchdowns in three quarters, and Texas A&M overcame a sluggish start to beat SMU 48-3 Saturday.
Manziel threw for four touchdowns and a school-freshman-record 294 yards. He also had 13 carries for 124 yards and a pair of a scoring runs.
Texas A&M (1-1) racked up 605 yards in offense and bounced back after losing its Southeastern Conference opener last week to No. 18 Florida.
SMU (1-2) suffered its most lopsided home loss since 2002, when it dropped a 52-6 contest to Oklahoma State.
Chase Hover kicked a 25-yard field goal in the third quarter for SMU's only points.
Texas A&M running back Christine Michael, who rushed for 899 yards in 2011, and safety Steven Campbell were suspended for the game for violating team rules. The suspensions were made known just before kickoff.
Against Florida, Manziel became the Aggies' first freshman starting quarterback in an opener since 1944.
Texas A&M started slow Saturday after a shaky second half against the Gators. The Aggies punted three times in the first quarter and failed on fourth-and-2 from the SMU 34.
Texas A&M's Taylor Bertolet missed a 23-yard field goal before Manziel and the offense put up 20 straight points to close out the first half.
Manziel found Ryan Swope for a 29-yard touchdown pass midway through second quarter.
The dual-threat quarterback then used his running ability two drives later when he scampered up the middle for a 48-yard TD. On the extra point, SMU's Margus Hunt blocked his 16th career kick -- which is second all-time in NCAA history.
The 6-foot-8 Hunt set the NCAA record last weekend by blocking his ninth career field goal.
The Aggies stretched their lead to 20-0 when Manziel -- who was 20 of 36 passing -- scrambled to his right and hooked up with Nwachukwu for a 26-yard touchdown pass with 1:03 left in the first half.
On Texas A&M's first drive of the second half, Manziel was about to be sacked before he broke free from linebacker Taylor Reed. He scrambled to his left and lofted a pass to Kenric McNeal, who ran in for a 42-yard touchdown.
Manziel added a 15-yard touchdown run and a 12-yard scoring pass to Nwachukwu in the third.
Jameill Showers replaced Manziel on the first drive of the fourth quarter.
Manziel broke the freshman passing record of Kevin Murray, who threw for 280 yards against Rice in 1983.
adidas Youth Texas A&M Aggies #12 Maroon Replica Football JerseyShop
South Carolina coach Steve Spurrier told his players and coaches Monday night that he is retiring immediately, sources told ESPN.com.
Steve Sarkisian has been plagued of late by apparent substance-related circumstances, including arriving to team facilities appearing intoxicated Sunday, according to sources.
Florida Gators quarterback Will Grier has been suspended for the year after testing positive for a performance-enhancing substance found in a supplement, coach Jim McElwain announced Monday.
Former USC coach Pete Carroll said Monday that he's saddened by Steve Sarkisian's situation and he has reached out to his former assistant.
Ole Miss offensive tackle Laremy Tunsil will be eligible to return to action for the Rebels following Saturday's game against Memphis, sources told ESPN.com on Monday.
After a decades-long ban, Nevada Gaming Control granted approval for the state's regulated sportsbooks to offer wagering on the Heisman Trophy, with LSU's Leonard Fournette the early favorite.